If going this route custom build it and reinforce it. 

I will rent out this new house, covering my mortgage payments with the rental income and steadily building equity over the years.Let me know if you are interested in doing something like this in Southern California, I have my team (brokerage, lender, architect, GC) ready to go.                          

TCOs are through your building department, and at least locally you can ask your inspector for this.

It takes time and effort to build.

However, locally some places in PA are allowing ADU, but have restrictions that if you build one for a parent or a child, that once they leave it can NOT be rented to a non-relative. 

keep building out your network and meeting people in the market you choose to invest in.Columbus, Ohio is a great market to consider if you're leaning towards appreciation.

The only thing I could do with the land is build a house there.

You can look those up with the local planning department if there are major redevelopment projects from roads and sidewalks to building renovations.  

Build a commercial team- insurance, financing, Planning/Zoning, fire inspector, trades- electrician, plumber, carpenter, excavation, concrete, hvac, flooring, engineers, signage, etc. 

Hello! I currently manage my parents' Condos for short-term renting. It has been going great, and I could do this for others. My question is, how do I find other clients to host their property for them?